Gear shift assembly comprehensive measuring tool

Abstract

This utility model relates to a comprehensive measuring tool for a gear shift assembly, comprising: a base, a positioning device, a first measuring device, and a second measuring device. The positioning device is used to install and position the shift shaft of the gear shift assembly. The first measuring device includes: a mounting base and a splined shaft. The splined shaft is rotatably mounted on the mounting base, and the mounting base is slidably mounted on the base along the axial direction of the splined shaft. The second measuring device includes: a measuring block and a detection pin. The measuring block is mounted on the base, and the distance between the two measuring blocks at opposite ends is the same as the distance between the inner sides of the two forks. The detection pin is configured to cooperate with the fork holes on the forks, and the detection pin is slidably mounted on the measuring block. This comprehensive measurement of the entire gear shift assembly changes the previous method of controlling the size of individual parts, effectively avoiding problems such as shift jamming and gearbox failure due to cumulative errors in part dimensions, and improving the first-pass yield of the gearbox.

Description

Technical Field

[0001] This utility model relates to the field of gear shift component testing technology, specifically to a comprehensive testing tool for gear shift components. Background Technology

[0002] A car's transmission uses gears and gear shifting mechanisms to transmit the engine's power to the drive shaft at appropriate torque and speed, adapting to the car's traction and speed requirements under different road conditions.

[0003] Shifting gears requires a shift assembly, which includes a shift fork, a shift fork shaft, a shift rack, and a locking bolt. For example, patent CN112303229A discloses a shift rack with a simple structure, good dynamic shifting smoothness, and high reliability. It includes a shift shaft, a shift mechanism transmission gear, and a shift rack fixedly mounted axially on the shift shaft corresponding to the position of the shift mechanism transmission gear. The straight rack portion of the shift rack meshes with the shift mechanism transmission gear. A shift fork is also fixedly mounted on the shift shaft, and the shift rack is fixed to the corresponding axial position of the shift shaft by at least one locking screw.

[0004] In particular, when inspecting the shifting components, the inspection is often carried out by controlling the size of individual parts. During the inspection, the cumulative error of the part size causes the shifting to fail, requiring repeated disassembly and reassembly for troubleshooting, and resulting in low production efficiency. Utility Model Content

[0005] In view of the above-mentioned problems in the existing technology, the technical problem to be solved by this utility model is that when testing the shifting component, the testing is often carried out by controlling the size of a single part; during the testing, the cumulative error of the part size causes the shifting to fail repeatedly due to disassembly and reassembly, resulting in low production efficiency.

[0006] To solve the above technical problems, this utility model adopts the following technical solution: a comprehensive measuring tool for shift components, comprising: Base; A positioning device is installed on the base, and the positioning device is used to install the shift shaft of the positioning shift assembly; A first measuring device includes: a mounting base and a splined shaft; the splined shaft is rotatably mounted on the mounting base, and the mounting base is slidably mounted on the base along the axial direction of the splined shaft, so that the splined shaft engages and disengages with the shift rack of the shift assembly; and The second measuring device is configured to correspond one-to-one with the two forks of the shift fork in the shift assembly; the second measuring device includes: a measuring block and a detection pin; the measuring block is mounted on the base; and the distance between the two measuring blocks at one end away from each other is the same as the distance between the inner sides of the two forks; the detection pin is configured to cooperate with the fork hole on the fork, and the detection pin is slidably mounted on the measuring block so as to slide into the corresponding fork hole.

[0007] Preferably, the positioning mechanism includes: a vertical support, a horizontal support, an upper bushing, a lower bushing, and a positioning cylinder; the lower end of the vertical support is mounted on the base, and one end of the horizontal support is mounted on the upper end of the vertical support; the upper bushing is mounted on the other end of the horizontal support; the lower bushing is mounted on the base, and the axes of the upper bushing and the lower bushing are coaxially arranged in the vertical direction; the positioning cylinder is slidably inserted into the upper bushing, and the positioning cylinder has a protruding edge that abuts against the upper end face of the upper bushing; the lower end of the positioning cylinder has a positioning hole, and the positioning hole and the hole on the lower bushing are both configured to be inserted into and cooperate with the shift shaft of the shift assembly.

[0008] Preferably, the positioning cylinder has an exhaust hole, which is connected to the positioning hole.

[0009] Preferably, the upper bushing is detachably mounted on the transverse support, and the lower bushing is detachably mounted on the base.

[0010] Preferably, the measuring block is detachably mounted on the base.

[0011] Preferably, the mounting bracket is slidably mounted on the base via a slide rail.

[0012] Preferably, the mounting base includes: a base body, a left cover plate, and a right cover plate; the base body is slidably mounted on the base, and a channel is provided on the base body, through which the spline shaft is inserted into the channel; the left cover plate and the right cover plate are detachably mounted on opposite sides of the base body in the direction of the spline shaft, respectively, to restrict the spline shaft from sliding out of the channel.

[0013] Preferably, it further includes: a handwheel; the handwheel is coaxially mounted on the splined shaft.

[0014] Preferably, it also includes a limiting bolt, which is mounted on the base and located on the travel of the mounting seat in the sliding direction.

[0015] Preferably, multiple feet are evenly installed on the bottom of the base.

[0016] Compared with the prior art, the present invention has at least the following advantages: In this invention, the comprehensive measurement of the entire shift assembly changes the previous method of controlling the size of individual parts. It effectively avoids problems such as shift jamming and failure of the transmission to pass the final assembly caused by the cumulative error of part size. It eliminates the need for repeated disassembly and inspection, and is simple and efficient to operate. It allows the qualified shift assembly to be successfully installed into the transmission assembly, thereby improving the first-time pass rate of the transmission. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a front view of a gear shift component integrated measuring tool provided in an embodiment of this utility model.

[0019] Figure 2 This is a top view of a gear shifting component integrated measuring tool provided in an embodiment of the present invention.

[0020] Figure label: 1. Base; 2. Splined shaft; 3. Measuring block; 4. Detection pin; 5. Vertical bracket; 6. Horizontal bracket; 7. Upper bushing; 8. Lower bushing; 9. Positioning cylinder; 10. Raised edge; 11. Positioning hole; 12. Vent hole; 13. Slide rail; 14. Seat body; 15. Left cover plate; 16. Right cover plate; 17. Channel; 18. Handwheel; 19. Limit bolt; 20. Foot pad; 21. Bracket. Detailed Implementation

[0021] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0022] See Figures 1-2 The present invention provides an embodiment of a gear shifting component comprehensive measuring tool, comprising: a base 1, a positioning device, a first measuring device, and a second measuring device; the positioning device is mounted on the base 1 and is used to install and position the gear shifting shaft of the gear shifting component; The first measuring device includes: a mounting base and a splined shaft 2; the splined shaft 2 is rotatably mounted on the mounting base, and the mounting base is slidably mounted on the base 1 along the axial direction of the splined shaft 2, so that the splined shaft 2 engages and disengages with the shift rack of the shift assembly; specifically, the splined shaft 2 has involute splines, which engage with the tooth profile on the shift rack through spline circumferential motion; The second measuring device is set one-to-one with the two forks of the shift fork in the shift assembly; the second measuring device includes: measuring block 3 and detection pin 4; measuring block 3 is mounted on base 1; and the distance between the two measuring blocks 3 at one end away from each other is the same as the distance between the inner sides of the two forks; detection pin 4 is set to cooperate with the fork hole on the fork, and detection pin 4 is slidably mounted on measuring block 3 so as to slide into the corresponding fork hole.

[0023] In practice, the shift shaft of the shift assembly is mounted on the base 1 using a positioning device, and the shift shaft is positioned using the positioning device; then the mounting base is pushed to slide along the axis of the spline shaft 2, and the spline shaft 2 is rotated to make the spline shaft 2 mesh with the shift rack of the shift assembly, thereby simulating the assembly state to test the meshing fit between the two. The inner sides of the two fork legs of the shift fork are placed against the two measuring blocks 3. Since the distance between the two measuring blocks 3 at their opposite ends is consistent with the standard distance between the inner sides of the two fork legs, if the inner sides of the fork legs can completely fit with the measuring blocks 3 without any obvious gaps, it indicates that the distance between the two fork legs of the shift fork meets the assembly requirements. If there are gaps or one side cannot fit, it indicates that there is a deviation in the fork leg distance. On this basis, the detection pins 4 in the second measuring device, which correspond one-to-one with the two fork legs of the shift fork, are pushed. The detection pins 4 slide along the measuring blocks 3. If the detection pins 4 can smoothly slide into the corresponding fork leg holes, it indicates that the height difference, angle, etc. of the shift fork legs of the shift assembly meet the requirements; otherwise, there is a problem. This comprehensive measurement of the entire shift assembly changes the previous method of controlling the size of individual parts, effectively avoiding problems such as shift jamming and failure to pass the gearbox assembly due to the cumulative error of part size. It eliminates the need for repeated disassembly and assembly for troubleshooting, and the operation is simple and efficient. It allows the qualified shift assembly to be successfully installed into the gearbox assembly, thereby improving the first-pass yield of the gearbox.

[0024] See Figures 1-2 In other embodiments, the positioning mechanism includes: a vertical support 5, a horizontal support 6, an upper bushing 7, a lower bushing 8, and a positioning cylinder 9; the lower end of the vertical support 5 is mounted on the base 1, and one end of the horizontal support 6 is mounted on the upper end of the vertical support 5; the upper bushing 7 is mounted on the other end of the horizontal support 6; the lower bushing 8 is mounted on the base 1, and the axes of the upper bushing 7 and the lower bushing 8 are coaxially arranged in the vertical direction; the positioning cylinder 9 is coaxially slidably inserted into the upper bushing 7, and the positioning cylinder 9 is provided with a protruding edge 10 that abuts against the upper end face of the upper bushing 7; the lower end of the positioning cylinder 9 is provided with a positioning hole 11, and the positioning hole 11 and the hole on the lower bushing 8 are both inserted and fitted with the shift shaft of the shift assembly.

[0025] In practice, the lower end of the shift shaft of the shift assembly is inserted into the hole of the lower bushing 8 to initially position the shift shaft. Then, the positioning cylinder 9 slides downward along the same axis as the upper bushing 7. Since the upper bushing 7 and the lower bushing 8 are coaxially arranged in the vertical direction, the positioning hole 11 at the lower end of the positioning cylinder 9 will be precisely fitted onto the upper end of the shift shaft. At this time, the protruding edge 10 on the positioning cylinder 9 abuts against the upper end face of the upper bushing 7, thus realizing the installation and limiting of the shift shaft. This positioning method, through the cooperation of the upper bushing 7, the lower bushing 8, and the positioning cylinder 9, ensures that the shift shaft does not shift during the measurement process, providing a stable benchmark for subsequent testing. Combined with the comprehensive testing of the measuring device, it effectively avoids measurement errors caused by inaccurate positioning of the shift shaft, further ensuring the accuracy of the test results. This allows qualified shift assemblies to be smoothly installed into the gearbox, reducing the need for repeated disassembly and reassembly due to assembly problems after the gearbox is off the production line, and improving the first-pass yield of the gearbox. Furthermore, the positioning cylinder 9 is provided with an exhaust hole 12, which communicates with the positioning hole 11. When the shift shaft is inserted into the positioning hole 11, the internal air is discharged through the exhaust hole 12 to avoid the positioning cylinder 9 from not falling smoothly or the shift shaft from having gaps due to air retention, and to ensure that the positioning cylinder 9 and the shift shaft fit tightly together.

[0026] See Figures 1-2 In other embodiments, the upper bushing 7 is detachably mounted on the transverse bracket 6, and the lower bushing 8 is detachably mounted on the base 1. Specifically, the upper bushing 7 is detachably mounted on the other end of the transverse bracket 6 via bolts, and the lower bushing 8 is detachably mounted on the base 1 via bolts. When it is necessary to adapt to different specifications of shift shafts, the bolts can be removed to replace the upper bushing 7 and lower bushing 8 of the corresponding size, and the matching positioning cylinder 9 can be replaced simultaneously, so that the positioning hole 11 and the hole of the lower bushing 8 can be precisely inserted into the new specification shift shaft. This detachable structure allows the measuring instrument to flexibly adapt to various shift shafts, eliminating the need to manufacture separate measuring instruments for different specifications, reducing equipment costs. Simultaneously, the replacement operation is simple, reducing adjustment time and improving the testing efficiency for different shift components, thereby better meeting diverse testing needs and ensuring the assembly quality of the gearbox.

[0027] See Figures 1-2 In other embodiments, the measuring block 3 is detachably mounted on the base 1. In specific implementation, the measuring block 3 is detachably mounted on the base 1 by bolts or other means. When it is necessary to test shift components with the same center distance of the shift forks but different fork distances, the original measuring block 3 can be directly removed and replaced with a measuring block 3 of the corresponding size. The distance between the ends of the new measuring blocks 3 that are far apart from each other is adapted to the standard distance between the inner sides of the two fork legs of the shift component to be tested.

[0028] See Figures 1-2In other embodiments, the mounting base is slidably mounted on the base 1 via a slide rail 13. Specifically, the mounting base is slidably mounted on the base 1 via the slide rail 13; the slide rail 13 is fixedly mounted on the base 1, and the mounting base is slidably mounted on the slide rail 13; pushing the mounting base along the slide rail 13 can smoothly move the splined shaft 2 closer to or further away from the shift assembly, allowing the splined shaft 2 to accurately engage or disengage with the shift rack, avoiding deviation during sliding that could affect engagement accuracy. Furthermore, a bracket 21 is also included, with the mounting base slidably mounted on the slide rail 13 via the bracket 21; the upper end of the bracket 21 is fixedly connected to the mounting base, and the lower end of the bracket 21 is slidably connected to the slide rail 13; the bracket 21 ensures that the mounting base has sufficient height to achieve engagement between the splined shaft 2 and the shift rack of the shift assembly.

[0029] See Figures 1-2 In other embodiments, the mounting base includes a base body 14, a left cover plate 15, and a right cover plate 16. The base body 14 is slidably mounted on the base 1, and a channel 17 is provided on the base body 14. The splined shaft 2 is inserted into the channel 17 through the channel 17. The left cover plate 15 and the right cover plate 16 are detachably mounted on opposite sides of the base body 14 in the direction of the splined shaft 2 to restrict the splined shaft 2 from sliding out of the channel 17. By removing the left cover plate 15 and the right cover plate 16, it is convenient to install, replace, and maintain the splined shaft 2 to adapt to different models of shifting components.

[0030] See Figures 1-2 In other embodiments, it further includes a handwheel 18; the handwheel 18 is coaxially mounted on the splined shaft 2. In specific implementation, the handwheel 18 is mounted on the splined shaft 2 by bolts; the handwheel 18 makes it easier to rotate the splined shaft 2.

[0031] See Figures 1-2 In other embodiments, a limiting bolt 19 is also included. The limiting bolt 19 is mounted on the base 1 and is located on the travel of the mounting seat in the sliding direction. When the spline shaft 2 is engaged with the shift rack, the base 1 contacts the limiting bolt 19 and can no longer move forward, thereby limiting the base 1.

[0032] See Figures 1-2 In another embodiment, a plurality of pads 20 are evenly installed under the base 1; the even arrangement of the pads 20 ensures the installation stability of the entire measuring instrument, reduces the measurement reference deviation caused by the shaking or tilting of the base 1, and improves the accuracy of each detection step.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A comprehensive measuring tool for a gear shifting assembly, characterized in that, include: Base; A positioning device is installed on the base, and the positioning device is used to install the shift shaft of the positioning shift assembly; A first measuring device includes: a mounting base and a splined shaft; the splined shaft is rotatably mounted on the mounting base, and the mounting base is slidably mounted on the base along the axial direction of the splined shaft, so that the splined shaft engages and disengages with the shift rack of the shift assembly; and The second measuring device is configured to correspond one-to-one with the two forks of the shift fork in the shift assembly; the second measuring device includes: a measuring block and a detection pin; the measuring block is mounted on the base; and the distance between the two measuring blocks at one end away from each other is the same as the distance between the inner sides of the two forks; the detection pin is configured to cooperate with the fork hole on the fork, and the detection pin is slidably mounted on the measuring block so as to slide into the corresponding fork hole.

2. The comprehensive measuring tool for a gear shifting assembly according to claim 1, characterized in that, The positioning device includes: a vertical support, a horizontal support, an upper bushing, a lower bushing, and a positioning cylinder; the lower end of the vertical support is mounted on the base, and one end of the horizontal support is mounted on the upper end of the vertical support; the upper bushing is mounted on the other end of the horizontal support; the lower bushing is mounted on the base, and the axes of the upper bushing and the lower bushing are coaxial in the vertical direction; the positioning cylinder is slidably inserted into the upper bushing, and the positioning cylinder has a protruding edge that abuts against the upper end face of the upper bushing; the lower end of the positioning cylinder has a positioning hole, and the positioning hole and the hole on the lower bushing are both configured to be inserted into and cooperate with the shift shaft of the shift assembly.

3. The comprehensive measuring tool for a gear shifting assembly according to claim 2, characterized in that, The positioning cylinder has an exhaust hole, which is connected to the positioning hole.

4. The comprehensive measuring tool for a gear shifting assembly according to claim 2, characterized in that, The upper bushing is detachably mounted on the transverse support, and the lower bushing is detachably mounted on the base.

5. A comprehensive measuring tool for a gear shifting assembly according to claim 1, characterized in that, The measuring block is detachably mounted on the base.

6. A comprehensive measuring tool for a gear shifting assembly according to claim 1, characterized in that, The mounting bracket is slidably mounted on the base via a slide rail.

7. A comprehensive measuring tool for a gear shifting assembly according to claim 1, characterized in that, The mounting base includes: a base body, a left cover plate, and a right cover plate; the base body is slidably mounted on the base, and a channel is provided on the base body, through which the spline shaft is inserted; the left cover plate and the right cover plate are detachably mounted on opposite sides of the base body in the direction of the spline shaft to restrict the spline shaft from sliding out of the channel.

8. A comprehensive measuring tool for a gear shifting assembly according to claim 1, characterized in that, Also includes: Handwheel; the handwheel is coaxially mounted on the splined shaft.

9. A comprehensive measuring tool for a gear shifting assembly according to claim 1, characterized in that, It also includes a limiting bolt, which is mounted on the base and located on the travel of the mounting seat in the sliding direction.

10. A comprehensive measuring tool for a gear shifting assembly according to claim 1, characterized in that, Multiple feet are evenly installed on the bottom of the base.

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